CN101169345A - Digital pressure testers - Google Patents
Digital pressure testers Download PDFInfo
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- CN101169345A CN101169345A CNA2006101141036A CN200610114103A CN101169345A CN 101169345 A CN101169345 A CN 101169345A CN A2006101141036 A CNA2006101141036 A CN A2006101141036A CN 200610114103 A CN200610114103 A CN 200610114103A CN 101169345 A CN101169345 A CN 101169345A
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Abstract
The invention discloses a digital pressure checking meter, comprising a shell. The lower part of the shell is provided with a pressure sealing connector, and one end of the pressure sealing connector positioned inside the shell is connected with a pressure sensor. The power supply end of the pressure sensor is connected with an excitation power supply. The output end of the pressure sensor is connected with a signal measuring cell, and the output end of the signal measuring cell is connected with a micro controller which is connected with the excitation power supply to control an outputted excitation signal of the excitation power supply. The shell is also internally provided with a pressure switch signal input terminal and an electric signal input terminal, wherein, the pressure switch signal input terminal is connected with the micro controller directly; and the electric signal input terminal is connected with the signal measuring cell. As the invention is provided with the electric signal input terminal, the pressure switch signal input terminal and a 24V power supply output terminal, the invention enriches and improves the functions of checking and measuring. The invention can be used for the check and measure in filed pressure gauge, pressure transmitter, pressure switch and pressure controller.
Description
Technical field
The present invention relates to instrument field, particularly relate to a kind of pressure calibration measuring ability that both possessed, the electrical signal detection function that possesses again can be calibrated detected pressures instrument, pressure unit and pressure transducer, can calibrate the digital pressure testers of detected pressures switch, pressure controller again.
Background technology
At present, the pressure detection technical field of every profession and trade, on-the-spot pressure detection instrument is divided into pointer precision pressure gauge, digital precision pressure gauge, digital pressure recorder and digital pressure testers.
It is directly perceived and need not characteristics such as power supply that the pointer-type precision pressure gauge has cheapness, reading, is used for calibrating the testing tensimeter more.But have that resistance to shock is poor, vibration the time is difficult for reading, the zero-bit pressure error of indication is difficult for eliminating, pressure data can not recorded and stored, the fatigue deformation of pressure spring pipe and can not realize problem such as electric signal measurement.
Digital precision pressure gauge and digital pressure recorder utilize the pressure/electric weight physical influence of pressure transducer, by electric signal digitizing detected pressures value, have characteristics such as digital reading, anti-vibration and power autonomous power supply, are used for calibrating the testing tensimeter more.But lack the electric signal measurement function, need to be equipped with the calibration detection that electric signal measurement equipment can be used for on-the-spot pressure unit and pressure transducer.
Traditional digital pressure testers has generally increased the electric signal measurement circuit on the digital pressure recorder basis, the calibration that is used for on-the-spot pressure unit and pressure transducer detects.But have that electric signal measurement function singleness, electrical power consumed are big, volume greatly, problem such as not portable on-the-spot use.
The applicant once applied for the patent of a " digital precision tensimeter ", and the patent No. is 200420118794.3, and it can realize the calibration measuring ability of high precision amount of pressure under little power consumption power supply.But it lacks the electric signal measurement function, therefore can not use as digital pressure testers specially.Still do not have a kind of little power consumption figures pressure testers at present, both possessed the pressure calibration measuring ability, the electrical signal detection function that possesses again can be calibrated detected pressures instrument, pressure unit and pressure transducer, can calibrate detected pressures switch, pressure controller again.
Summary of the invention
The purpose of this invention is to provide a kind of pressure calibration measuring ability that both possessed, the electrical signal detection function that possesses again, detected pressures instrument, pressure unit and pressure transducer can be calibrated, the digital pressure testers of detected pressures switch, pressure controller can be calibrated again.
For achieving the above object, the present invention takes technical scheme: a kind of digital pressure testers, include a watchcase, described watchcase bottom is provided with an impulse sealing adaptor, the end of described impulse seal head in watchcase is connected with a pressure transducer, the power end of described pressure transducer connects an excitation power supply, and the output terminal of described pressure transducer connects a signal measurement unit, and the output terminal of this signal measurement unit connects a microcontroller; This microcontroller is connected with described excitation power supply, the output drive signal of its control excitation power supply, and this microcontroller also connects a LCDs, and described LCDs is arranged on the front panel of watchcase; It is characterized in that: also be provided with a pressure switch signal input terminal and electric signal input end in the described watchcase, this pressure switch signal input terminal directly is connected with microcontroller, and this electric signal input end then is connected with signal measurement unit.
In the above-mentioned digital pressure testers, fit tightly on the described pressure transducer and be provided with an environment temperature sensor, the output terminal of this environment temperature sensor connects described microcontroller, the pressure data that the temperature data that described microcontroller transmits according to environment temperature sensor transmits described signal measurement unit carries out the temperature corrected Calculation to be handled, and the data after will handling show by LCDs output.
In the above-mentioned digital pressure testers, described signal measurement unit includes an input protection circuit, a signal amplifier and an A/D converter, and each electric signal of input passes to signal amplifier and A/D converter successively after this input protection circuit protection.
In the above-mentioned digital pressure testers, also be provided with a power supply/charge control circuit in the described watchcase, it is connected with an external power interface, and is subjected to the control power supply or the charging of described microcontroller; One group of rechargeable battery, it is connected on the power supply/charge control circuit, be subjected to the control of power supply/charge control circuit to charge or system is powered, this rechargeable battery place is provided with a battery temperature sensor, and the output terminal of this battery temperature sensor connects described microcontroller.
In the above-mentioned digital pressure testers, one multi-way switch also is set in the described watchcase, its input end is connected on the power supply/charge control circuit, gather the power supply/charge data that respectively save rechargeable battery, its output terminal connects signal measurement unit, the data of gathering are passed to signal measurement unit and microcontroller successively, this microcontroller is according to transmitting power supply/charge data, the data of battery temperature sensor and the data of environment temperature sensor of coming, calculate the charge maintenance parameter that respectively saves rechargeable battery, and the power supply/charge control circuit is implemented control.
In the above-mentioned digital pressure testers, described pressure switch signal input terminal includes SW signal input part and COM common port, and described electric signal input end includes current signal mA input end and COM common port, voltage signal V input end and COM common port; Also be provided with 24V voltage output end and COM common port on the described watchcase, this 24V voltage output end is connected with described power supply/charge control circuit.
In the above-mentioned digital pressure testers, described watchcase is provided with a power switch key, and it is connected with the power supply/charge control circuit with microcontroller, and the switch of control microcontroller and power supply/charge control circuit; The front panel of described watchcase also is provided with a pressure unit key, a pressure reset key, one electrical measurement switch key, an electrical measurement reset key, send key, a storage key, a Menu key, definite key, a 24V options button and a key backlight, and its output terminal all is connected with described microcontroller.
In the above-mentioned digital pressure testers, the rear panel of described watchcase is provided with a data communication interface, and this data communication interface is connected with microcontroller.Described data communication interface is RS232 interface, USB interface, 1394 interfaces or RS485 interface.
The present invention is owing to take above design, and it has the following advantages:
1, the present invention is on digital precision pressure gauge invention basis, be provided with electric signal input end, pressure switch signal input terminal and 24V power output terminal, abundant and perfect calibration measuring ability, the calibration that can be used for on-the-spot manometer, pressure unit, pressure switch and pressure controller detects.
2, the present invention adopts integrated instrument configuration design, and each measuring unit and circuit unit are integrated in the instrument, make measuring operation convenient.
3, the present invention is owing to have the 24V power output terminal, and when the detected pressures transmitter, pressure unit both can adopt independently power connection, also can correspondence receive on the 24V power output terminal of the present invention, make operate very convenient.
4, the present invention is beneficial to instrument power supply and battery charge maintenance, thereby has improved battery serviceable life and security owing to adopted a kind of power supply and battery charge control circuit, is suitable for carrying on-the-spot the use more.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention
Fig. 2 is the circuit block diagram of excitation power supply of the present invention
Fig. 3 looks synoptic diagram for outward appearance master of the present invention
Fig. 4 is an outward appearance schematic rear view of the present invention
Fig. 5 is an outward appearance schematic top plan view of the present invention
Embodiment
As shown in Figure 1, a kind of digital pressure testers, include a watchcase 1, watchcase 1 bottom is provided with an impulse sealing adaptor 2, the end of impulse seal head 2 in watchcase is connected with a pressure transducer 3, the power end of pressure transducer 3 connects an excitation power supply 4, and the output terminal of pressure transducer 3 connects an electric signal measurement unit 5, and the output terminal of electric signal measurement unit 5 connects a microcontroller 6; Microcontroller 6 is connected with excitation power supply 4, the output drive signal of its control excitation power supply 4, and this microcontroller 6 also connects a LCDs 7, and this LCDs 7 is arranged on the front panel of watchcase 1; Also be provided with a pressure switch signal input terminal 8 and electric signal input end 9 in the watchcase 1, pressure switch signal input terminal 8 directly is connected with microcontroller 6, and 9 of electric signal input end are connected with electric signal measurement unit 5.
Among the present invention, fit tightly on the pressure transducer 3 and be provided with an environment temperature sensor 10, the output terminal of this environment temperature sensor 10 connects microcontroller 6, the pressure data that the temperature data that microcontroller 6 transmits according to environment temperature sensor 10 transmits signal measurement unit 5 carries out the temperature corrected Calculation to be handled, the unified pressure that is scaled 20 ℃, and the data after will handling show by LCDs 7 outputs.Thus one, because environment temperature to the caused error effect of pressure transducer, can be handled and eliminate, thereby improve the accuracy of measurement of the present invention through the temperature corrected Calculation of microprocessor.
Above-mentioned electric signal measurement unit 5 includes an input protection circuit 51, a signal amplifier 52 and an A/D converter 53; each electric signal of input is through input protection circuit 51 entering signal amplifiers 52 and A/D converter 53; signal amplifier 52 can be same integrated circuit (IC) chip with A/D converter 53; also can be the separation integrated circuit (IC) chip, it all can be buied from market.
When the instrument of reality is used, because personnel operation is careless, may the wrong electrical signal line, at this moment, the electric signal of input can damage signal amplifier.For this reason, spy of the present invention has set up input protection circuit 51, and each electric signal of input is after the protection of input protection circuit 51, and entering signal amplifier 52 and enter A/D converter 53 avoids circuit to damage again.The principle of input protection circuit 51 is when input signal goes wrong; impedance variation can take place in input protection circuit 51, forms the protection loop, avoids forceful electric power signal corruption signal amplifier 52 and A/D converter 53; after cancelling input signal, input protection circuit 51 can recover former impedance state.Input protection circuit 51 among the present invention can directly be buied from market, does not do too much at this and gives unnecessary details.
As shown in Figure 2, above-mentioned excitation power supply 4 includes a voltage-reference 41, a digital regulation resistance 42 and a voltage controlled current source 43, and it connects successively; Microcontroller 6 is connected with the digital regulation resistance 42 of excitation power supply, and control figure potentiometer 42, makes voltage controlled current source 43 outputs one pulse current pumping signal 44; Above-mentioned voltage-reference 41, digital regulation resistance 42 and voltage controlled current source 43 all can be buied from market, and pressure transducer 3 is a kind of Huygens's electric bridge that is made of voltage dependent resistor (VDR), it also can directly be buied from market, and pulse current pumping signal 44 acts on the electric bridge of pressure transducer 3.Owing to used the pulse current pumping signal, though in voltage dependent resistor (VDR) because the variation of pressure produces the variation of impedance, the output of current source also not can because of so and be affected, thereby can improve the accuracy of measurement; Consider from another point of view, pulse signal is compared constant current signal and is belonged to intermittent power supply, intermittent power supply itself can compare power saving, and intermittent power supply more can make the thermal value of resistance reduce greatly, the reducing of resistance heating amount can reduce the electric power of wasting because of joule heating effect, and, can improve the accuracy of whole pressure transducer because the thermal effect of resistance is little, reduce measuring error.
In the present embodiment, as shown in Figure 1, also be provided with a power supply/charge control circuit 11 in the watchcase 1, it is connected with an external power interface 12, and is subjected to the control power supply or the charging of microcontroller 6; One group of rechargeable battery 13, it is connected on the power supply/charge control circuit 11, be subjected to the control of power supply/charge control circuit 11 to charge or system is powered, these rechargeable battery 13 places are provided with a battery temperature sensor 14, and the output terminal of this battery temperature sensor 14 connects microcontroller 6.In addition, one multi-way switch 15 also is set in the watchcase 1, its input end is connected on the power supply/charge control circuit 11, gather the power supply/charge data that respectively save rechargeable battery 13, its output terminal connects the electric signal measurement unit, and the electrical signal data of gathering is exported to the electric signal measurement unit, according to the power supply/charge data of gathering and the data of environment temperature sensor 10, microcontroller 6 can calculate the charge maintenance parameter that respectively saves rechargeable battery 13, and power supply/charge control circuit 11 is implemented control.
Cooperate Fig. 1, shown in Figure 5, above-mentioned pressure switch signal input terminal 8 includes SW signal (switching signal) input end 81 and COM common port 82, and electric signal input end 9 includes current signal mA input end 91 and COM common port 82, voltage signal V input end 92 and COM common port 82; In addition, also be provided with 24V voltage output end 93 and COM common port 82 on the watchcase, this 24V voltage output end 93 is connected with power supply/charge control circuit 11.
In the digital pressure testers provided by the present invention, as Fig. 1, shown in Figure 3, watchcase 1 is provided with a power switch key 16, and it is connected with power supply/charge control circuit 11 with microcontroller 6, and the switch of control microcontroller 6 and power supply/charge control circuit 11; The front panel of watchcase 1 also is provided with a pressure unit key 17, a pressure reset key 18, one electrical measurement switch key 19, an electrical measurement reset key 20, send key 21, a storage key 22, a Menu key 23, one definite key 24, a 24V options button 25 and a key 26 backlight, and its output terminal all is connected with microcontroller 6.
On-stream pressure unit key 17, pressure unit character display that can the switchable liquid crystal display screen; On-stream pressure reset key 18 can be finished the zero clearing calibration to described gaging pressure; Operation electrical measurement switch key 19 can be finished the measurement of described electric signal is switched, and electric signal unit's character display of LCDs is switched; Operation electrical measurement reset key 20 can be finished the zero clearing calibration to described electric signal measurement; Operation sends key 21, can finish the communication transmit operation to measurement data; Operation store key 22 can be finished the storage operation to measurement data; Actions menu key 23 can be finished the selection to the measuring operation program; Key 24 is determined in operation, can finish determining the measuring operation program; Operation 24V key 25 can be finished the operation of opening 24V power supply output; Operate a key 26 backlight, can finish the operation of opening and closing LCD screen backlight power supply.
In the present embodiment, watchcase 1 rear panel is provided with a data communication interface 27 (as Fig. 1, shown in Figure 4), and data communication interface 27 is connected with microcontroller 6, and when needs carried out data communication, data communication interface 27 can be connected with interfaces such as computing machines.Certainly, data communication interface can have multiple pattern, such as RS232 interface, USB interface, 1394 interfaces or RS485 interface.
The present invention at first is screwed into impulse sealing adaptor 2 in the pressure validator when in use, and after exerting pressure, compare detected tensimeter indicating value this moment with digital pressure displayed value of the present invention, can realize that traditional tensimeter detects;
When needs detected pressures transmitter, as long as more detected pressure unit output electric signal correspondence is received electric signal input end 9, the transmitter power end is connected, perhaps correspondence is received 24V power output terminal 93 of the present invention, after exerting pressure, observe the pairing electric signal of digital pressure displayed value of the present invention digital displaying value, can realize that pressure unit detects;
When needs detected pressures switch or pressure controller, as long as more detected pressure switch or pressure controller output electric signal correspondence are received on the pressure switch signal input terminal 8, change when exerting pressure gradually, observe pressure switch of the present invention connect or the pairing digital digital displaying value of turn-off transient, can realize that pressure switch or pressure controller detect.
Claims (9)
1. digital pressure testers, include a watchcase, described watchcase bottom is provided with an impulse sealing adaptor, the end of described impulse seal head in watchcase is connected with a pressure transducer, the power end of described pressure transducer connects an excitation power supply, the output terminal of described pressure transducer connects a signal measurement unit, and the output terminal of this signal measurement unit connects a microcontroller; This microcontroller is connected with described excitation power supply, the output drive signal of its control excitation power supply, and this microcontroller also connects a LCDs, and described LCDs is arranged on the front panel of watchcase; It is characterized in that: also be provided with a pressure switch signal input terminal and electric signal input end in the described watchcase, this pressure switch signal input terminal directly is connected with microcontroller, and this electric signal input end then is connected with signal measurement unit.
2. digital pressure testers according to claim 1, it is characterized in that: fit tightly on the described pressure transducer and be provided with an environment temperature sensor, the output terminal of this environment temperature sensor connects described microcontroller, the pressure data that the temperature data that described microcontroller transmits according to environment temperature sensor transmits described signal measurement unit carries out the temperature corrected Calculation to be handled, and the data after will handling show by LCDs output.
3. digital pressure testers according to claim 2; it is characterized in that: described signal measurement unit includes an input protection circuit, a signal amplifier and an A/D converter; each electric signal of input passes to signal amplifier and A/D converter successively after this input protection circuit protection.
4. according to claim 1 or 2 or 3 described digital pressure testers, it is characterized in that: also be provided with a power supply/charge control circuit in the described watchcase, it is connected with an external power interface, and is subjected to the control power supply or the charging of described microcontroller; One group of rechargeable battery, it is connected on the power supply/charge control circuit, be subjected to the control of power supply/charge control circuit to charge or system is powered, this rechargeable battery place is provided with a battery temperature sensor, and the output terminal of this battery temperature sensor connects described microcontroller.
5. digital pressure testers according to claim 4, it is characterized in that: a multi-way switch also is set in the described watchcase, its input end is connected on the power supply/charge control circuit, gather the power supply/charge data that respectively save rechargeable battery, its output terminal connects signal measurement unit, the data of gathering are passed to signal measurement unit and microcontroller successively, this microcontroller is according to transmitting the power supply/charge data of coming, the data of battery temperature sensor and the data of environment temperature sensor, calculate the charge maintenance parameter that respectively saves rechargeable battery, and the power supply/charge control circuit is implemented control.
6. digital pressure testers according to claim 4, it is characterized in that: described pressure switch signal input terminal includes SW signal input part and COM common port, and described electric signal input end includes current signal mA input end and COM common port, voltage signal V input end and COM common port; Also be provided with 24V voltage output end and COM common port on the described watchcase, this 24V voltage output end is connected with described power supply/charge control circuit.
7. digital pressure testers according to claim 6 is characterized in that: described watchcase is provided with a power switch key, and it is connected with the power supply/charge control circuit with microcontroller, and the switch of control microcontroller and power supply/charge control circuit; The front panel of described watchcase also is provided with a pressure unit key, a pressure reset key, one electrical measurement switch key, an electrical measurement reset key, send key, a storage key, a Menu key, definite key, a 24V options button and a key backlight, and its output terminal all is connected with described microcontroller.
8. according to claim 1 or 2 or 3 or 5 described digital pressure testers, it is characterized in that: the rear panel of described watchcase is provided with a data communication interface, and this data communication interface is connected with microcontroller.
9. digital pressure testers according to claim 8 is characterized in that: described data communication interface is RS232 interface, USB interface, 1394 interfaces or RS485 interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101141036A CN100535624C (en) | 2006-10-27 | 2006-10-27 | Digital pressure testers |
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|---|---|---|---|
| CNB2006101141036A CN100535624C (en) | 2006-10-27 | 2006-10-27 | Digital pressure testers |
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| CN101169345A true CN101169345A (en) | 2008-04-30 |
| CN100535624C CN100535624C (en) | 2009-09-02 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101988912A (en) * | 2010-09-04 | 2011-03-23 | 山西科致成科技有限公司 | Digital signal processor (DSP)-based intelligent gas sensor checking instrument for mines |
| WO2012159232A1 (en) * | 2011-05-26 | 2012-11-29 | 北京康斯特仪表科技股份有限公司 | Multi-range field full-automatic pressure and electric signal calibrating instrument |
| CN103490781A (en) * | 2013-09-14 | 2014-01-01 | 西安奇维科技股份有限公司 | High-accuracy analog signal acquisition circuit with temperature self-correcting function |
| CN104165728A (en) * | 2014-09-01 | 2014-11-26 | 北京斯贝克科技有限责任公司 | Pressure controller high in accuracy |
| CN104727806A (en) * | 2013-12-24 | 2015-06-24 | 中国石油天然气股份有限公司 | Load sensor monitoring method and system |
| CN106248295A (en) * | 2016-08-31 | 2016-12-21 | 合肥迈思瑞仪器仪表有限公司 | The method of calibration of digital pressure testers based on temperature correction feedback |
| CN109900427A (en) * | 2019-04-15 | 2019-06-18 | 上海市计量测试技术研究院 | A kind of automated calibration system and calibration method for electric measuring type pressure gauge |
| CN110857898A (en) * | 2018-08-22 | 2020-03-03 | 精量电子（深圳）有限公司 | Oil-filled pressure sensor |
| CN112903181A (en) * | 2021-02-24 | 2021-06-04 | 北京康斯特仪表科技股份有限公司 | Intelligent pressure gauge |
| CN113008451A (en) * | 2021-02-24 | 2021-06-22 | 北京康斯特仪表科技股份有限公司 | Pressure gauge |
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| CN102305689B (en) * | 2011-05-26 | 2013-04-10 | 北京康斯特仪表科技股份有限公司 | On-site full-automatic pressure and electric signal calibrator |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101988912B (en) * | 2010-09-04 | 2012-09-26 | 山西科致成科技有限公司 | Digital signal processor (DSP)-based intelligent gas sensor checking instrument for mines |
| CN101988912A (en) * | 2010-09-04 | 2011-03-23 | 山西科致成科技有限公司 | Digital signal processor (DSP)-based intelligent gas sensor checking instrument for mines |
| US10012221B2 (en) | 2011-05-26 | 2018-07-03 | Beijing Const Instrument Technology Inc. | High pressure bidirectional miniature electric gas pump |
| WO2012159232A1 (en) * | 2011-05-26 | 2012-11-29 | 北京康斯特仪表科技股份有限公司 | Multi-range field full-automatic pressure and electric signal calibrating instrument |
| US9394895B2 (en) | 2011-05-26 | 2016-07-19 | Beijing Const Instrument Technology Inc. | Multi-range on-site full-automatic pressure calibration instrument |
| US9395261B2 (en) | 2011-05-26 | 2016-07-19 | Beijing Const Instrument Technology Inc. | Multi-range field full-automatic pressure and electric signal calibration instrument |
| CN103490781A (en) * | 2013-09-14 | 2014-01-01 | 西安奇维科技股份有限公司 | High-accuracy analog signal acquisition circuit with temperature self-correcting function |
| CN104727806A (en) * | 2013-12-24 | 2015-06-24 | 中国石油天然气股份有限公司 | Load sensor monitoring method and system |
| CN104727806B (en) * | 2013-12-24 | 2017-10-17 | 中国石油天然气股份有限公司 | A kind of load transducer monitoring method and system |
| CN104165728A (en) * | 2014-09-01 | 2014-11-26 | 北京斯贝克科技有限责任公司 | Pressure controller high in accuracy |
| CN106248295A (en) * | 2016-08-31 | 2016-12-21 | 合肥迈思瑞仪器仪表有限公司 | The method of calibration of digital pressure testers based on temperature correction feedback |
| CN110857898A (en) * | 2018-08-22 | 2020-03-03 | 精量电子（深圳）有限公司 | Oil-filled pressure sensor |
| CN109900427A (en) * | 2019-04-15 | 2019-06-18 | 上海市计量测试技术研究院 | A kind of automated calibration system and calibration method for electric measuring type pressure gauge |
| CN109900427B (en) * | 2019-04-15 | 2024-06-04 | 上海市计量测试技术研究院 | Automatic calibration system and calibration method for electric measurement type pressure gauge |
| CN112903181A (en) * | 2021-02-24 | 2021-06-04 | 北京康斯特仪表科技股份有限公司 | Intelligent pressure gauge |
| CN113008451A (en) * | 2021-02-24 | 2021-06-22 | 北京康斯特仪表科技股份有限公司 | Pressure gauge |
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| CN100535624C (en) | 2009-09-02 |
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